14-Bit High Bandwidth Multiplying DACs with Serial Interface

The AD5450 / AD5451 / AD5452 / AD5453 are CMOS 8-/10-/12-/14-bit current output digital-to-analog converters (DACs), respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suited to several applications, including battery-powered applications.

As a result of manufacture on a CMOS submicron process, these DACs offer excellent 4-quadrant multiplication characteristics of up to 12 MHz.

These DACs use a double-buffered, 3-wire serial interface that is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP interface standards. Upon power-up, the internal shift register and latches are filled with 0s, and the DAC output is at zero scale.

The applied external reference input voltage (VREF) determines the full-scale output current. These parts can handle ±10 V inputs on the reference, despite operating from a single-supply power supply of 2.5 V to 5.5 V. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external current-to-voltage precision amplifier.

The AD5450 / AD5451 / AD5452 / AD5453 DACs are available in small 8-lead TSOT, and the AD5452 / AD5453 are also available in MSOP packages. The AD5453 also comes in 8-lead LFSCP.

APPLICATIONS

* Portable battery-powered applications

* Waveform generators

* Analog processing

* Instrumentation applications

* Programmable amplifiers and attenuators

* Digitally controlled calibration

* Programmable filters and oscillators

* Composite video

* Ultrasound

* Gain, offset, and voltage trimming

* Qualified for automotive applications

* 12 MHz multiplying bandwidth

* Integral nonlinearity (INL) of ±0.25 LSB at 8-bit

* 8-lead TSOT and MSOP packages

* 2.5 V to 5.5 V supply operation

* Pin-compatible 8-/10-/12-/14-bit current output DACs

* ±10 V reference input

* 50 MHz serial interface